Abstract
Oxidative stress-induced neuronal cell death requires opening of the mitochondrial permeability transition pore. P53 mitochondrial translocation and association with Cyclophilin D (Cyp-D) is required for the pore opening. Here we tested this signaling axis in oxygen glucose deprivation (OGD)/re-oxygenation-induced in vitro neuronal death. Using mitochondrion immunoprecipitation, we found that p53 translocated to mitochondrion and associated with Cyp-D in SH-SY5Y cells exposed to (OGD)/re-oxygenation. Disruption of this complex by Cyp-D inhibitor Cyclosporine A (CsA), or by Cyp-D or p53 deficiency, significantly inhibited OGD/re-oxygenation-induced apoptosis-independent cell death. Conversely, over-expression of Cyp-D in SH-SY5Y cells caused spontaneous cell death, and these cells were more vulnerable to OGD/re-oxygenation. Finally, CsA or Cyp-D RNAi suppressed OGD/re-oxygenation-induced neuronal cell death in primary cultures. Together, our study suggests that OGD/re-oxygenation-induced in vitro cell death involves a mitochondrial Cyp-D/p53 signaling axis.
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Abbreviations
- OGD:
-
Oxygen glucose deprivation
- Cyp-D:
-
Cyclophilin D
- CsA:
-
Cyclosporine A
- H2O2 :
-
Hydrogen peroxide
- LDH:
-
Lactate dehydrogenase
- mPTP:
-
Mitochondrial permeability transition pore
- ROS:
-
Reactive oxygen species
- NAC:
-
n-Acetyl cysteine
- GFP:
-
Green fluorescence protein
- MEFs:
-
Mouse embryonic fibroblasts
- ANT:
-
Adenine nucleotide translocase
- VDAC:
-
Voltage-dependent anion transporter
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This research was supported in part by grants from the National Natural Science Foundation of China. Funding recourses have no role in study design; in the collection, analysis and interpretation of data; in the writing of the report; and in the decision to submit the article for publication.
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Li-Ping Zhao and Chao Ji two authors contribute equally.
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Zhao, LP., Ji, C., Lu, PH. et al. Oxygen Glucose Deprivation (OGD)/Re-Oxygenation-Induced In Vitro Neuronal Cell Death Involves Mitochondrial Cyclophilin-D/P53 Signaling Axis. Neurochem Res 38, 705–713 (2013). https://doi.org/10.1007/s11064-013-0968-5
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DOI: https://doi.org/10.1007/s11064-013-0968-5